package com.sky.service.impl;

import com.alibaba.druid.support.json.JSONUtils;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.security.auth.login.LoginContext;
import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    WeChatProperties weChatProperties;
    @Autowired
    UserMapper userMapper;

    /**
     * 用户登录
     * @param userLoginDTO
     * @return
     */
    public User login(UserLoginDTO userLoginDTO) {
        String openid = getOpenid(userLoginDTO);
        if(openid==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //检测数据库是否存在用户 不存在则注册
        User user = userMapper.selectByOpenid(openid);
        if(user==null){
            user = User.builder().openid(openid).createTime(LocalDateTime.now()).build();
            userMapper.insert(user);
        }
        return user;

    }

    private String getOpenid(UserLoginDTO userLoginDTO) {
        //把授权码向微信接口发送请求 得到openid
        Map<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code",userLoginDTO.getCode());
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;

    }
}
